package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdUserMapper;
import com.heima.admin.service.AdUserService;
import com.heima.common.constants.admin.AdminConstants;
import com.heima.common.exception.CustomException;
import com.heima.model.admin.dtos.AdUserDto;
import com.heima.model.admin.pojos.AdUser;
import com.heima.model.admin.vo.AdUserVo;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.utils.common.AppJwtUtil;
import org.apache.commons.lang3.RandomStringUtils;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/**
 * @author zhanghao
 * @date 2021/4/10 21:51
 */
@Service
public class AdUserServiceImpl extends ServiceImpl<AdUserMapper, AdUser> implements AdUserService {
    @Override
    public ResponseResult login(AdUserDto dto) {
        //1. 检查参数
        if (dto == null || StringUtils.isBlank(dto.getName()) || StringUtils.isBlank(dto.getPassword())) {
            throw new CustomException(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2. 根据用户名查询用户
        AdUser user = getOne(Wrappers.<AdUser>lambdaQuery().eq(AdUser::getName, dto.getName()));
        //不存在
        if (user == null) {
            throw new CustomException(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        //3. 检查status状态9正常状态
        if (user.getStatus() != AdminConstants.AD_USER_ISSTATUS) {
            throw new CustomException(AppHttpCodeEnum.LOGIN_USER_STATUS_INVALID);
        }
        //4. 检查密码是否正确
        String inputPwd = DigestUtils.md5DigestAsHex((dto.getPassword() + user.getSalt()).getBytes());
        String password = user.getPassword();
        if (!inputPwd.equals(password)) {
            throw new CustomException(AppHttpCodeEnum.LOGIN_PASSWORD_ERROR);
        }
        //5. 修改用户最近登录时间
        user.setLoginTime(new Date());
        updateById(user);
        //6. 颁发token
        String token = AppJwtUtil.getToken(Long.valueOf(user.getId()));
        //7. 封装结果
        Map map = new HashMap();
        map.put("token", token);
        AdUserVo userVo = new AdUserVo();
        BeanUtils.copyProperties(user, userVo);
        map.put("user", userVo);
        return ResponseResult.okResult(map);
    }

    @Override
    public ResponseResult register(AdUser user) {
        //1.参数校验
        if (StringUtils.isEmpty(user.getName()) || StringUtils.isEmpty(user.getPassword())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID, "用户名或密码不能为空");
        }
        // 业务处理
        // 用户的密码加密规则是：MD5（密码 + salt）
        String salt = RandomStringUtils.randomAlphanumeric(8);
        String password = user.getPassword();
        user.setPassword( DigestUtils.md5DigestAsHex((password + salt).getBytes()) );
        user.setSalt(salt);
        user.setCreatedTime(new Date());
        user.setStatus(9);
        save(user);
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }
}
